package com.xuecheng.ucenter.service.impl;

import com.alibaba.fastjson.JSON;
import com.xuecheng.ucenter.mapper.XcMenuMapper;
import com.xuecheng.ucenter.mapper.XcUserMapper;
import com.xuecheng.ucenter.model.dto.AuthParamsDto;
import com.xuecheng.ucenter.model.dto.XcUserExt;
import com.xuecheng.ucenter.model.po.XcMenu;
import com.xuecheng.ucenter.service.AuthService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;

@Slf4j
@Component
public class UserServiceImpl implements UserDetailsService {
    @Autowired
    XcMenuMapper xcMenuMapper;
    @Autowired
    XcUserMapper xcUserMapper;
    @Autowired
    ApplicationContext applicationContext;
    @Override
    public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException {
        //将传入的json转成AuthParamsDto对象
        AuthParamsDto authParamsDto=null;
        try{
            authParamsDto=JSON.parseObject(s,AuthParamsDto.class);
        } catch (Exception e){
            throw new RuntimeException("请求认证的参数不符合要求");
        }
        //获取认证类型
        String authType=authParamsDto.getAuthType();
        //根据认证类型从spring容器取出指定的bean
        String beanName=authType+"_authservice";
        AuthService authService=applicationContext.getBean(beanName,AuthService.class);
        //调用统一的认证接口
        XcUserExt execute = authService.execute(authParamsDto);

        UserDetails userDetails = getUserPrincipal(execute);
        return userDetails;
    }

    /**
     * 查询用户信息
     * @param xcUser 用户id，主键
     * @return com.xuecheng.ucenter.model.po.XcUser 用户信息
     */
    public UserDetails getUserPrincipal(XcUserExt xcUser){
        //权限
        String[] authorities={"test"};
        String password = xcUser.getPassword();
        //查询用户的权限
        List<XcMenu> xcMenus = xcMenuMapper.selectPermissionByUserId(xcUser.getId());
        if(xcMenus.size()>0){
            List<String> permissions=new ArrayList<>();
            xcMenus.forEach(m->{
                //拿到了用户拥有的权限标识符号
                permissions.add(m.getCode());
            });
            //将permissions转数组
            authorities=permissions.toArray(new String[0]);
        }

        xcUser.setPassword(null);
        //将用户信息转为json
        String userJson= JSON.toJSONString(xcUser);
        UserDetails userDetails = User.withUsername(userJson).password(password).authorities(authorities).build();
        return userDetails;
    }
}
